Paper Info
Title
Conductive Polymer Foam Surface Improves the Performance of a Capacitive EEG Electrode
Abstract
In this paper, a new conductive polymer foam-surfaced electrode was proposed for use as a capacitive EEG electrode for nonintrusive EEG measurements in out-of-hospital environments. The current capacitive electrode has a rigid surface that produces an undefined contact area due to its stiffness, which renders it unable to conform to head curvature and locally isolates hairs between the electrode surface and scalp skin, making EEG measurement through hair difficult. In order to overcome this issue, a conductive polymer foam was applied to the capacitive electrode surface to provide a cushioning effect. This enabled EEG measurement through hair without any conductive contact with bare scalp skin. Experimental results showed that the new electrode provided lower electrode-skin impedance and higher voltage gains, signal-to-noise ratios, signal-to-error ratios, and correlation coefficients between EEGs measured by capacitive and conventional resistive methods compared to a conventional capacitive electrode. In addition, the new electrode could measure EEG signals, while the conventional capacitive electrode could not. We expect that the new electrode presented here can be easily installed in a hat or helmet to create a nonintrusive wearable EEG apparatus that does not make users look strange for real-world EEG applications.
Year
DOI
Venue
2012
10.1109/TBME.2012.2215032
IEEE Trans. Biomed. Engineering
Keywords
Field
DocType
Biomedical electrodes, capacitive sensors, electroencephalography (EEG), polymer foams
Conductive polymer,Computer science,Resistive touchscreen,Electrical conductor,Voltage,Capacitive sensing,Electronic engineering,Electrical impedance,Contact area,Electrode
Journal
Volume
Issue
ISSN
59
12
0018-9294
Citations 
PageRank 
References 
3
0.49
6
Authors
4
Name
Order
Citations
PageRank
Hyun Jae Baek1517.46
Hong Ji Lee2325.03
yong gyu lim311122.40
Kwang Suk Park426646.43